Textile composite material

Abstract

The invention relates to a textile composite material used to stabilize, consolidate or reinforce soils and layers of earth, and which can also be used as a load-carrying drainage or filtering layer and comprises at least one nonwoven fabric ( 1 ). The disadvantage of nonwovens, used alone or in textile composites made of various plastic nonwovens, lies in their limited load-carrying capacity. To create a low cost textile composite material comprising at least one nonwoven fabric, having a high tear resistance in a main load direction and the ability to absorb high tensile forces without undue stretching, exclusively parallel, straight, load-carrying plastic filament yarns ( 2 ) are knitted, sewed or Raschel-knitted onto the nonwoven ( 1 ).

What is claimed is:  
     
       1. A textile composite material used to stabilize, consolidate or reinforce soils and layers of earth and as a load-carrying drainage or filtration layer, the textile composite material comprising at least one nonwoven ( 1 ) having only unidirectional tensile load-carrying plastic filament yarns ( 2 ) knitted, sewed or Raschel-knitted to the nonwoven ( 1 ), wherein the tensile load-carrying yarns ( 2 ) extend in a warp direction of the nonwoven ( 1 ). 
     
     
       2. A textile composite material according to  claim 1 , characterized in that a cross sectional area of the tensile load-carrying yarns ( 2 ) is 4 to 50 mm 2 . 
     
     
       3. A textile composite material according to  claim 1 , characterized in that a distance between the tensile load-carrying yarns ( 2 ) is 1 to 100 mm. 
     
     
       4. A textile composite material according to  claim 1 , characterized in that the tensile load-carrying yarns ( 2 ) are made of split polypropylene yarn. 
     
     
       5. A textile of composite material according to  claim 1 , further comprising a binding yarn ( 3 ), with which the tensile load-carrying yarns ( 2 ) are Raschel-knitted, knitted or sewed to the nonwoven ( 1 ), and which consists of split polypropylene yarn. 
     
     
       6. A textile composite material according to  claim 1 , characterized in that the tensile load-carrying yarns ( 2 ) are Raschel-knitted to the nonwoven ( 1 ) in pairs, the distance between pairs of yarns being 1 to 100 mm. 
     
     
       7. A textile composite material according to  claim 1 , characterized in that the nonwoven ( 1 ), the tensile load-carrying yarns ( 2 ) and a binding yarn ( 3 ), with which the tensile load-carrying yarns ( 2 ) are knitted, sewed or Raschel-knitted, are made of polypropylene.